Tool path generation by offsetting curves on polyhedral surfaces based on mesh flattening

Xu, Jizheng; Sun, Yuwen; Wang, Shunke

doi:10.1007/s00170-012-4075-6

Cited by 22 publications

(6 citation statements)

References 23 publications

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“…Ball end milling is commonly used for generating complex surfaces. 8,9 When milling complex surfaces using a ball nose end mill, in few instances, the tool uses its nominal diameter to cut. In most cases, the contact region between the tool and the part varies from its centre to a value that depends on the axial depth of cut and the slope of the surface.…”

Section: Literature Surveymentioning

confidence: 99%

Assessment of tool path strategies for milling complex surfaces in hardened H13 steel

Magalhães

Ferreira

2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this work, parts with complex geometry were machined in hardened H13 steel using different tool path strategies for roughing and finishing, seeking to evaluate how the tool paths and cutting conditions influence machining time, surface roughness, and geometric precision. The results showed a reduction of up to 7.8% in roughing time and 25% reduction in finishing time among the evaluated tool paths. The roughness of the complex surface depends significantly on the tool path used and is significantly impaired by the increase in the feed per tooth. The geometric deviations varied from 0.02 to 0.23 mm depending on the adopted tool path.

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Section: Literature Surveymentioning

confidence: 99%

Assessment of tool path strategies for milling complex surfaces in hardened H13 steel

Magalhães

Ferreira

2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…For mapping the mesh surface, without the loss of generality, the radius of the circular region is set equal to 1, i.e., r ¼ 1 in Eqs. (2) and (5).…”

Section: Resultsmentioning

confidence: 99%

“…However, due to the lack of information of the parametric domain for mesh surfaces, tool path generation methods for the parametric surface are difficult to be directly used for CNC milling of mesh surface. As a result, the tool path of iso-planar type, which is generated by slicing the mesh surface using a series of parallel planes, is the typical choice for machining a mesh surface even at the expense of machining quality and efficiency in CNC milling [5]. Iso-planar method is simple and straightforward in the aspect of tool path computation but it has the inherent disadvantage that excessive short paths may be generated when processing the surface with complex shapes, especially with irregular boundary [6].…”

Section: Introductionmentioning

confidence: 99%

Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves

Sun

et al. 2018

Journal of Manufacturing Science and Engineering

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This paper presents a new spiral smoothing method to generate smooth curved tool paths directly on mesh surfaces. Spiral tool paths are preferable for computer numerical control (CNC) milling, especially for high-speed machining. At present, most spiral tool path generation methods aim mainly for pocketing, and a few methods for machining complex surface also suffer from some inherent problems, such as selection of projecting direction, preprocessing of complex offset contours, easily affected by the mesh or mesh deformation. To address the limitations, a new spiral tool path method is proposed, in which the radial curves play a key role as the guiding curves for spiral tool path generation. The radial curve is defined as one on the mesh surface that connects smoothly one point on the mesh surface and its boundary. To reduce the complexity of constructing the radial curves directly on the mesh surface, the mesh surface is first mapped onto a circular region. In this region, the radial lines, starting from the center, are planned and then mapped inversely onto the mesh surface, thereby forming the desired radial curves. By traversing these radial curves using the proposed linear interpolation method, a polyline spiral is generated, and then, the unfavorable overcuts and undercuts are identified and eliminated by supplementing additional spiral points. Spline-based technique of rounding the corners is also discussed to smooth the polyline spiral, thereby obtaining a smooth continuous spiral tool path. This method is able to not only greatly simplify the construction of radial curves and spiral tool path but also to have the ability of processing and smoothing complex surfaces. Experimental results are presented to validate the proposed method.

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“…Sun) short paths resulted from the irregular boundaries which can usually increase the number of interruptions or rapid traversals during the machining process and decrease the machining efficiency [4], especially when machining the nonzero genus triangular mesh surface. Actually, in NC machining of the sculptured surfaces, the surfaces with holes, concave cavities or convex platforms that all can be viewed as nonzero genus surfaces are being more widely confronted than before.…”

Section: Introduction mentioning

confidence: 99%

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

Sun

Jin

et al. 2016

Computer-Aided Design

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Tool path generation by offsetting curves on polyhedral surfaces based on mesh flattening

Cited by 22 publications

References 23 publications

Assessment of tool path strategies for milling complex surfaces in hardened H13 steel

Assessment of tool path strategies for milling complex surfaces in hardened H13 steel

Spiral Tool Path Generation Method on Mesh Surfaces Guided by Radial Curves

Smooth tool path generation for 5-axis machining of triangular mesh surface with nonzero genus

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